Experimental Investigation of the Effects of Reverse Bending and Straightening Process on Carbon Steel Bars used for Civil Engineering Applications
Abstract: This paper presents
an experimental investigation of the effects of reverse bending and
straightening process on the mechanical properties of a typical carbon steel
bar used for civil engineering applications. Twenty four specimens each were
used for the metallogarphy, microhardness and tensile tests. The investigation
revealed that the reverse bending and straightening process has no significant
effect on the bars’ through-thickness microstructure and hardness. However, the
reverse bending and straightening process reduces the yield load, ultimate
load, and displacement at fracture of the bars by 4.27%, 2.58%, and 18.62%
respectively. These results highlight the need to take into consideration the
effects of the previous loading history of the bars/wires, particularly the
reduction in the displacement at fracture and consequently, the ductility of
the bars/wires in the design and fitness for purpose assessment of components
made from them, since the bars/wires could experience high strain during
installation and in service due to overloads.
Keywords: Carbon steel bars,
hardness, microstructure, reverse bending and straightening, tensile property
Author: Adewole, K. K., Bull,
S. J
Journal Code: jptsipilgg140022
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